A mobile phone's main characteristics, by definition, are the ability to make and receive phone calls as well as exchange text messages. A smartphone should be a phone that has the ability to run applications but these days it seems to be the other way around: a mobile computer that can also do voice calls. A recent O2 study shows that smartphone owners have at least four more important things to do on their smartphones than to place calls. According to the findings, people are using their smartphones for at least two hours every day, out of which more than half of that time is dedicated ...